{"id":17757,"date":"2016-01-05T23:15:46","date_gmt":"2016-01-05T14:15:46","guid":{"rendered":"https:\/\/cg-method.com\/after-effects\/?p=17757"},"modified":"2026-01-12T18:01:25","modified_gmt":"2026-01-12T09:01:25","slug":"after-effects-gravity-expression","status":"publish","type":"post","link":"https:\/\/cg-method.com\/after-effects\/after-effects-gravity-expression\/","title":{"rendered":"After Effects\u2502\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u91cd\u529b\u3092\u8868\u73fe\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"\n<p>\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u3067\u91cd\u529b\u3092\u8868\u73fe\u3057\u305f\u3044<\/p>\n\n\n\n<p>\u624b\u5165\u529b\u3067\u518d\u73fe\u3059\u308b\u3088\u308a\u3001\u5f0f\u3092\u7528\u3044\u305f\u307b\u3046\u304c\u65e9\u3044\u304b\u306a\u3068\u601d\u3044\u63a2\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u91cd\u529b\u306e\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3<\/h2>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>seedRandom(index,true)\nmGravBase=9.81; \/\/basic gravity\nmGravVar=random(-1,1); \/\/gravity variation\nmAccel=time*(mGravBase+mGravVar);\nX=value[0];\nY=value[1]+Math.pow(mAccel,2);\n[X,Y]<\/code><\/pre><\/div>\n\n\n\n<p>\u203b\u81ea\u7531\u843d\u4e0b\u306e\u516c\u5f0f\u306f\u300cv=gt\u3001y=(1\/2)gt^2\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u203b\u30e9\u30f3\u30c0\u30e0random(-1,1)\u306e\u5024\u3092\u5165\u308c\u308b\u3068\u3070\u3089\u3064\u304d\u304c\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u3057\u305f\u5834\u5408<\/h2>\n\n\n\n<p>\u4f4d\u7f6e\u3092\u9078\u629e\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>props = app.project.activeItem.selectedProperties;\nfor (var i = 0; i &lt; props.length; i++){\n  if (props[i].canSetExpression){\n    props[i].expression = &quot;seedRandom(index,true); mGravBase=9.81;mGravVar=random(-1,1); mAccel=time*(mGravBase+mGravVar); X=value[0]; Y=value[1]+Math.pow(mAccel,2); [X,Y]&quot;;\n  }\n}<\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u3067\u91cd\u529b\u3092\u8868\u73fe\u3057\u305f\u3044 \u624b\u5165\u529b\u3067\u518d\u73fe\u3059\u308b\u3088\u308a\u3001\u5f0f\u3092\u7528\u3044\u305f\u307b\u3046\u304c\u65e9\u3044\u304b\u306a\u3068\u601d\u3044\u63a2\u3057\u3066\u307f\u307e\u3057\u305f\u3002 \u91cd\u529b\u306e\u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3 \u203b\u81ea\u7531\u843d\u4e0b\u306e\u516c\u5f0f\u306f\u300cv=gt\u3001y=(1\/2)gt^2\u300d\u3067\u3059\u3002 \u203b\u30e9\u30f3\u30c0\u30e0random( [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":17945,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[28],"tags":[],"class_list":["post-17757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-expression-script"],"_links":{"self":[{"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/posts\/17757","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/comments?post=17757"}],"version-history":[{"count":3,"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/posts\/17757\/revisions"}],"predecessor-version":[{"id":17946,"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/posts\/17757\/revisions\/17946"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/media\/17945"}],"wp:attachment":[{"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/media?parent=17757"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/categories?post=17757"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cg-method.com\/after-effects\/wp-json\/wp\/v2\/tags?post=17757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}